And there are some endeavors that carry significant downside risk, such that ANY mistake will likely be the last one made, and thus require especially fastidious forethought. Take, for example, Alexander Polli, a wingsuit flyer who daringly undertakes self-procreated challenges that literally stare death in the face and require an unimaginable degree of advanced preparation, precision and courage . . . or craziness — here is one such example: